Grate and pallet structure



April 29, 1930.

E. w. SHALLOCK 1,756,037

GRATE AND PALLET STRUCTURE Original Filed Jan. 9, 1928 2 Sheets-Sheet 2Qff/venf' AWN-Q. M, Quit W. MLWF/My 3% Patented Apr. .29, 1930 p 1 755037,

UNITED STATES. PAT NT OFFICE w. srmLLocI; or cnreaco, ILLmoIs, ASSIGNOR'ro mnarcur'onn LAMATION- courm, or CHICAGO, ILLINOIS, A conrorearxon ornew roan GBATE AND PALLET STRUCTURE Original application filed January9, 1928, Serial K052415384. Divided and this application fi led December3, 1928. Serial No. 323,457.

This invention relates to pallet and grate ing the sections thereto.While this strucstructures, and more particularly to a structure ishighly efficient it necessitates the use ture of the character statedfor use with sinof a specially constructed pallet frame. My

tering machines of what is known as the present invention has to do moreparticularly Dwight and, Lloyd type. p with means-whereby a gratestructure'com- 55 Pallets u d in-ore'sintering machines are posed of aplurality o grate sections can commonly ft. and more in width and arereadily be applied to a pallet frame of exist- Y provided with a singlegrate corresponding, F ing construction and now commonl used in'substantially, in width and length to the sintering machines of the typere erred to.

width and length of the pallet, that is, the Further objects andadvantages of rnyin e0 grate-used in a pallet of this sort measuresVention will appear from the detailed deapproximately 6 ft. in width by2 ft. in scriptron.

length. During the sinterin operation the In-thedrawmgs: grate issubjected to intense lieat and is apt F1g.1 s an end perspective view ofa pallet to buckle or burn out so that it has to be reand gratestructure in accordance with my inplaced. These grates are ratherexpensive v nfilon, One, of the grate sections being and, due totheir'size, are diflicult to handle 'omltte Q I I v by hand. This meansa considerable lossv in g- 2 1S aplan View of ll' f the g t time andlabor aswell as expense in replaci ns.

2o i th grate t commonl happens th t b t F g. 3 1 s a s1de view of oneof the sections. a relatively small-area of tlie grate is burned g 4 18a section taken substantially on out or war ed but, under presentconditions, 4-4 of Fig. 2. this necessitates the replacing of the entireF g- 5 1S a fragmentary detail view,'in perate. spective, of the palletframe taken on a line 25 One of the main obje t of my in ti extendinglongitudinally of the same and in i t ovide a pallet and a ate structureadvance of the transverse center thereof. 4 in which the grate iscompose of a plurality Flg. 1s a transverse sectionthrough the of gratesectlon's which can be quickl 're-' pallet, Including the gratestructure, partsmoved'and replaced. In the event of urng Shown inelevation- I ing out or warping of any of the sections this ig- 7 alongitudinal sectional View particular section can bereplaced without ghthe P s wing the g Strucany necessit for replacing the entire grate tureapplied, parts being shown in elevation. structure. l have also foundthat b using Fig. 8 is a fragmentary sectional view relatively short ornarrow grate sectlons the ak n substantially Q11 line 88 of Fig. 7,

at tendenc thereof to warp is much less than the adjacent end portions'f oftwo of the grate the ten ency of a one iece grate of. the fullsections width ofv the pallet. his is due, probably, section. p to .themore uniform distribution of heat Fig. 9 is a perspective detail of theinner throughoutthe smaller sectionthan is posada ter. sible when usinga one piece grate of rela- FIg. 10 is a perspective detail of one of the'9 tively great extent. outer adapters. I Inmy copendinfigapplicationfor grate and Fig. 11 is a detail of modified fasteningpallet structure, ed anuaryg); 1928, Serial means. p I No.245,284,-whichhas matured into Patent I have illustrated my inventionasapplied 45 No. 1,722,344, dated July 30, 1929, ofwhich to a pallet coinrising a rectangular frame.

-thisappl1cat1on is-a division, I have shown 1 ha side are 2 which areconnected a pallet having a frame of s ecial construcby bars which maybetermed the end bars, t1on and a grate composed o a plurality of andintermediate bars 1 parallel to grate sections having elementscooperating bars 3. This'frameisprovlded, at each side W with elementsofthe pallet frame for securthereof, with depending brackets 5 in whichshown broken away and in are secured stub shafts 6 upon which aremounted flanged rollers 7 which travel upon the track of the sinteringmachine.

The pallet, in practice, is disposed transversel of the machine andtravels lengthwise thereof upon the track. I have, therefore, referredto the greater dimension of the pallet frame as its width and the lessor shorter-dimension as its length, referring to the relationofthepallet to themachine. Each of the side bars 2 is provided, at itsupper portion, with an outwardly inclined flange 8 to which is securedin a suitable manner, as by riveting, a side plate 9. The bars 3 and 4are connected, at suitable intervals, by cross members 10. Each of thesemembers com-.

prises two web elements or fillets 11 formed integrally therewith andwith the bars connected by such cross members. These-pallets define asubstantially V-shaped socket 12. The cross members 10 materiallyreinforce the frame 1 as a whole and reduce likelihood of warping of thebars thereof. The pallet so far described is of known construction,being that which is commonly used=in sintering machines of the typereferred to. y

In order that a sectional grate may be used with this pallet frame Iprovide adapters which seat upon andv are secured to the cross members10 at the transverse center of the frame. In the construction shown,there are four bars connecting the side bars 2 of the frame and,consequently, a I employ three adapters. The central adapter 13 is ofsubstantlally V-shape and is provided, in the outer face of each arm,with a groove 14 which receives the inner edge portion of fillet 11. Theadapter 13 is provided, at its lower or vertex portion, with an opening15 which receives a bolt 16 passing through cross member 10, a nut 17being screwed onto the upper end of this bolt and bearing against theadapter so as to secure the same, in co-operatlon with the bolt, to thecross member.

Preferably the head of the bolt 16 is countersunk in cross member 10 asillustrated. Each arm of the adapter is provided with an extension 18-atits upper end which is inclined upwardly and inwardly of the adaptor at19, and is provided with an outwardly extending web 20 disposed tocontact with the bar 4 adjacent the upper end of the arm. The arms ofthe adapter, and the extensions thereof, define an opening 21,Whichaccommodates the upper end of the bolt and the nut, the upperportion of this opening being substantially of dovetail shape and beingrestricted at 22. When the adapter is secured to the-cross member 10 itis held securely in position and against movement transversely of thesame by the fillets 11 which engage into the grooves 14. An adapter 23is mounted upon each of the cross pieces 10 between the hars3 and 4,this adapter being similar in all respects to the adapter except that ithe opening 24 thereof is ofimenter.

The adapters receive securing lugs or heads 25 depending from gratesections 26 at the inner ends thereof. Preferably, though notnecessarily, each grate section is further provided with a reinforcingrib 27 which e'xtends from the head 25 to apoint adjacent the outer endof the grate section, this rib being disposed centrally of the section.The rib and the head are preferably cast integrally with the section, asillustrated. The section'is further provided, at its 'outer end 7 and inits upper face, with a central depression 28 and with two lugs 29 ateach side of this depression. This depression is adapted for receptionof a securing pin 30 which is inserted through a nipple 31 (Fig. 6)threaded through flange 8 of the frame.

The pin is releasably secured in the nipple in a suitable manner, as bya cotter pin, or a other suitable member 32 inserted through the nipple31 and pin, 30. In Fig. 11 I have shown a modified form of securingmeans for'the outer end of the section, such form including a pin 33which is inserted through flange 8 and is provided, at its inner end,with a head 34 disposed between lugs 35 on the upperrface of section 26.-'A cotter pin 36 is inserted through the outer end of pin 33 and servesto releasably secure it in position.

'The grate is illustrated as formed of six sections 26, each equal inlength to one-half the sides of the pallet frame by the pins and lugs inthe manner described, the sections be-v Y ing thus effectively securedto the pallet and held against-undesirable looseness or play. In theevent of warping, burning or other damage to an of the grate sections,such section can rea 'ly grate structure.

By providingthe adapters mounted upon the cross members of the palletframe in the manner illustrated and described, a grate structurecomposed of a plurality of inde pendently removable and replaceablesections can readily be applied to a pallet ofpresent construction suchas is commonlyused 1n slnterlng machines.

.The outerends of these sections are then secured to be removed andreplaced without disturbing the other sections of the members defining athe. cross members, I cross members and seating upon the fillets,

ing the sections The grate sections are provided with openings ofsuitable type and disposition to permit ready flow of air and othergases through the sections during combustion of the material supportedthereon during the sinteringoperation, as well understood inthe art. Thesections shown are of What is known as the pinhole type, though anyother suitable or preferred type of section may be employed. While Ihave described my invention as applied to a pallet adapted for use withthe Dwight and Lloyd type of sintering machine, I do not in any waylimit myself to this one type of pallet since, in its broader aspects,it may be applied to pallets of other types with advantage.

.What I claim is:

1. In combination, a pallet, an adapter member detachably secured tosaid pallet and having an upwardl restricted recess, a grate sectionhaving a ownwardly enlarged de-' pending head entering said recess'andinterlocking therewith, and diagonal corner pieces on the palletinterlocked with said adapter member.

2; In combination, a pallet lrame comprising side bars and cross barsextending across the frame and connecting the side bars, cross membersconnecting said cross bars and comprising fillets connecting said crossbars and adapters secured to the said fillets and the adapters havingcooperating means holding said adapters against movement across theframe, and grate sections seating upon the frame bars and havingreleasable interlocking engagement with the adapters.

3. In combination, members bracing said frame, each of said membersdefining a substantially V-shaped socket, adapters of substantiallyV-shape fitting into said sockets and cross-members, the arms of saidadapters having grooves receiving the lateral portions of thecross-members, and grate sections seating upon the frame, said gratesections and the adapters having cooperating means releasably securingthe sections to the adapters;

4. In combination, a allet frame, crossmembers bracing said ame, each ofsaid socket, adapters fitting into the sockets and secured to thecrossmembers, and grate sections seating upon the frame, said grate sectionsand the adapters having cooperating means releasably securto theadapters. 5. In' combination, a pallet frame, crossmembersbracing saidframe, each of said members comprising fillets defining a substantiallyV-shaped socket, adapters fitting into said sockets and secured to thecrossmembers, said adapters having grooves receivlng'the fillets andeach having an opening forreceptionof a coacting securing mema palletframe, cross I her, and grate sections mounted upon the frame and havingdepending securing members engageable into said openings and cooperatingwith the adapters for securing the grate sections to the frame.

6. In combination, a pallet frame comprising side bars and cross-barsconnecting said side bars, cross-members connecting the crossbars,adapters seating upon the cross-members and disposed between thecross-bars and held thereby against movement lengthwise of the palletframe, means for securing the adapters to the cross-members and forholding said adapters against movement across the frame, and ratesections seating upon the frame, said grate sections and the adaptershaving cooperating means releasably securing the sectionsto theadapters.

7. In combination, a pallet frame comprising side bars and cross-barsconnecting the side bars, cross-members connecting the crossbars,adapters seating upon and secured to the cross-members, grate sectionsseatin upon the frame and disposed end to end in a utting andnon-overlapping relation, and cooperating means carried by the gratesections and the adapters for releasably securing the section's to theadapters- In witness whereof, I hereunto subscribe my name this 23d dayof November, 1928.

EDWARD W. SHALLOGK.

secured to the

